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Finding the Fourth Proportional to 193.19, 289.78 and 165.85

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Solution

The fourth proportional to 193.19, 289.78 and 165.85 is: 248.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.19 : 289.78 = 165.85 : x
  2. Step 2: Convert to fraction form
    193.19/289.78 = 165.85/x
  3. Step 3: Cross multiply
    193.19x = 289.78 × 165.85
  4. Step 4: Simplify right side
    193.19x = 48,058.87
  5. Step 5: Solve for x
    x = 48,058.87/193.19
  6. Step 6: Final answer
    x = 248.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.